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ASTM D3194-17
Standard Test Method for Rubber From Natural Sources´Plasticity Retention Index (PRI)
NORMA vydaná dňa 1.1.2017
Informácie o norme:
Označenie normy: ASTM D3194-17
Poznámka: NEPLATNÁ
Dátum vydania normy: 1.1.2017
Kód tovaru: NS-674333
Počet strán: 3
Približná hmotnosť: 9 g (0.02 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
Kategórie - podobné normy:
Anotácia textu normy ASTM D3194-17 :
Keywords:
natural rubber, plasticity, P.R.I., retention index,, ICS Number Code 83.040.10 (Latex and raw rubber)
Doplňujúce informácie
| Significance and Use | ||||||||
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4.1 This test method may be used to evaluate the heat and/or oxidation stability (aging) of raw rubber under controlled conditions. High original and aged plasticity values usually correspond to good aging properties. The ratio of the aged to original plasticity values expressed as a percentage, the PRI, is used as an indication of aging. |
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| 1. Scope | ||||||||
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1.1 This test method gives an indication of the oxidation resistance of raw natural rubber at a specified temperature. This resistance is indicated by the Plasticity Retention Index (PRI), a ratio expressed as a percentage of the aged plasticity to the original plasticity determined by means of a parallel plate plastometer. A low PRI value indicates a poor resistance to oxidation. 1.2 The values stated in SI units are to be regarded as the standard. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. |
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| 2. Referenced Documents | ||||||||
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